D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
47
D90
Plus
Line Distance Protection System
Chapter 3: Installation
Installation
This section describes the physical and electrical installation of the D90
Plus
.
Physical installation
The D90
Plus
is designed as a 19-inch rack horizontal mount unit. The modular design
allows the relay to be easily upgraded or repaired by a qualified service person. The
faceplate is hinged to allow easy access to the removable modules.
Dimensions
The case dimensions are shown below, along with cutout details for panel mounting. When
planning the location of your panel cutout, ensure that provision is made for the faceplate
to swing open without interference to or from adjacent equipment.
The D90
Plus
must be mounted such that the faceplate sits semi-flush with the panel or
switchgear door, allowing the operator access to the front panel keys and USB
communications port. The D90
Plus
is secured to the panel with the use of four screws
supplied with the relay.
NOTE
NOTE:
A 1U (1 rack-unit) space should be left below the chassis when mounting for ventilation
and to allow the front panel to swing open without obstruction.